Not the act, but the volition accompanying itó the intentóconstitutes the crime, in sexual, as well as other cases. The habitual sexual criminal may, or may not, possess a larger number of sexual anomalies than the normal man; but they are stronger; or the latter is stronger to subdue them; and while the moral sense of humanity has no cerebral localization, being simply one of the adaptations of human life to social environments, without it, men cannot help becoming criminals. Thus the various strata of society are distinguished, not by wealth, education nor refinement, as is popularly supposed, but by frontal, parietal, or occipital cerebral development. In society the occipital class is the most numerous; comprising, as it does, those who act from volition alone. The "frontals" are the thinking class; the "parietals" those of impulse, character, dignity, who make up the great world of commercial industry. Thus we have the categories of criminals corresponding to this fairly accurate physiological division. (1) Criminals of thought (Frontal); criminals of caution (Parietal); criminals of volition or instinct (Occipital). These latter are the real, or true, criminals; in which are found a vast majority of all sexual offenders. The class is especially passionate, showing by their acts, not a resurrection of atavism, as Corre, Albrecht and Lombroso taught; but simply spontaneous and involuntary deviations from the normal type. To no other class of persons does Locke's aphorism so well apply: nihil est in intellectu, quod non antea fuerat in sensu. They know nothing but what the senses teach them, and even that, only imperfectly.